recrystallization of benzoic acid

Question

a 5.4g sample od D/L serine was recrystallized using 35mL of boiling water and then was cooled to 0 degree. if the solubility of D/L serine in boiling water is 32.2 g/100g and at 0 degree is 2.2 g/100g, determine the mass of D/L serine that will be isolated from the solution at o degree

Answer 1

Use the volume and solubility to determine the mass that dissolved when boiling.

Then use the solubility at zero degrees to determine how much would remain dissolved after crystallized

substract the two masses to determine the amount recrystalized.